Austempered Ductile Iron
austempered ductile iron, the material
ADI applications
austempered ductile iron
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Standard ADI Grades

The properties of each grade are determined by the Austempering treatment and are not affected by chemistry of the iron.

European Standard Grades according to EN 1564

ADI Grade Min. Tensile
Strength
Min. Yield
Strength
Elongation Hardness
Mpa Mpa % BHN
800 800 500 8 260 – 320
1000 1000 700 5 300 – 360
1200 1200 850 2 340 – 440
1400 1400 1100 1 380 – 480

US Standard Grades according to ASTM A897/A897M-03

ADI
Grade
Min. Tensile
Strength
Min. Yield
Strength
Elongation Impact Energy Hardness
Mpa Ksi Mpa Ksi % Joules Ft-lb BHN
1 900 130 650 90 9 100 75 269 – 341
2 1050 150 750 110 7 80 60 302 – 375
3 1200 175 850 125 4 60 45 341 – 444
4 1400 200 1100 155 2 35 25 388 – 477
5 1600 230 1300 185 1 20 15 402 – 512


ADI Treatments Limited, Doranda Way, West Bromwich, West Midlands, B71 4LE  Tel: +44 (0)121 525 0303